Pipe joints or couplings – Elbow – Serially connected – adjustable
Patent
1997-03-28
1999-07-13
Nicholson, Eric K.
Pipe joints or couplings
Elbow
Serially connected, adjustable
285423, 285 5, 285235, 285397, A01G 2500, F16L 5500
Patent
active
059215909
ABSTRACT:
A flexible swivel coupling includes a a first elbow, a second elbow, and a flexible nipple connected between the two elbows. The first and second elbows are threaded on the interior surface of at least one of the legs of each elbow, and the flexible nipple is threaded at both ends, for connection between the two elbows. The outside diameter of the nipple, at least at the threaded ends, is slightly larger than the inside diameter of the threaded legs of the two elbows, so that the nipple threads are slightly compressed when the nipple is threaded into the elbows and forms a water tight seal without the need for o-rings or other additional sealing means.
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patent: 5383692 (1995-01-01), Watts
Nicholson Eric K.
Sefrna Ronald B.
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